VFU is console (text mode) file manager for UNIX.
It includes all standard file handling features as
well as filename completion, tree views, regexp
selection, archive support, and much more. See the
homepage for a full feature list.

Cervisia is a KDE graphical frontend for the CVS client. It features checking out a module from a repository, updating or retrieving the status of a working directory or single files, common operations like add, remove and commit, diff against the repository and between different revisions, annotated view of a file, view of the log messages in tree and list form as well as resolving of conflicts in a file.

dvtm brings the concept of tiling window
management, popularized by X11-window managers
like dwm, to the console. As a console window
manager, it tries to make it easy to work with
multiple console based programs like vim, mutt,
cmus, or irssi. dvtm is intended to be used where
X11 isn't available or over SSH. In conjunction
with dtach, it can be seen as a lightweight
alternative to GNU screen.

DirSync Pro is a powerful, easy-to-configure tool to synchronize the contents of one directory with another. It can compare files by various attributes, such as size or modified-date. It can synchronize an unlimited number of directories, and has a detailed logging function.

Krusader is an advanced twin-panel
(commander-style) file-manager for KDE 3.x, but
with many extras. It provides all the
file-management features you could possibly want.
It also features extensive archive handling,
mounted filesystem support, FTP, an advanced
search module, a text viewer/editor, directory
synchronization, support for file content
comparisons, powerful batch renaming, and much
more. It supports the following archive formats:
tar, zip, bzip2, gzip, rar, ace, arj, and rpm. It
can also handle other KIOSlaves such as smb:// or
fish://.

The GNOME Structured File Library is a utility library for reading and writing structured file formats. Support for MS OLE2 streams is complete, as is zip import. There is also support for document metadata and some initial work on decompressing VBA streams in OLE files for future conversion to other languages. This library replaces libole2 and is used in gnumeric, mrproject, abiword, libwv2, koffice. It is also part of the AAF format.

BibleTime is a Bible study tool. It is based on the Sword library, which provides the functions to access modules like bibles, lexicons, books, and commentaries. BibleTime provides an easy-to-use but powerful interface.

FontForge is an outline font editor that lets you create your own Postscript, TrueType, OpenType, CID-keyed, multi-master, CFF, SVG, and bitmap (BDF) fonts, or edit existing ones. It also lets you convert one format to another, and has support for many Macintosh font formats.

Ratpoison is a simple window manager with no large library
dependencies, no fancy graphics, no window decorations, and no rodent
dependence. It is largely modeled after GNU Screen, which has done
wonders in the virtual terminal market. All interaction with the
window manager is done through keystrokes. ratpoison has a prefix map
to minimize the key clobbering that cripples EMACS and other quality
pieces of software. All windows are maximized and kept maximized to
avoid wasting precious screen space.

FAM, the File Alteration Monitor, provides an API which applications can use to be notified when specific files or directories are changed. It comes in two parts: fam, the daemon which listens for requests and delivers notification, and libfam, a library which client applications can use to communicate with fam.